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Journal of Environmental Biology

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https://www.readbyqxmd.com/read/28779748/growth-and-survival-of-the-tropical-sea-urchin-salmacis-sphaeroides-fed-with-different-macroalgae-in-captive-rearing-condition
#1
M A Rahman, F M Yusoff, A Arshad, R Ara
An experiment was undertaken to develop appropriate culture techniques for high-valued tropical sea urchin, Salmacis sphaeroides under captive aqua-rearing conditions. Three-month-old juveniles produced through induced breeding, larval rearing and metamorphic induction were stocked with 20 juveniles in each of nine well-aerated glass aquaria (46 x 30 x 30 cm).? Juveniles fed with red alga (Amphiroa fragilissima) were designated as Treatment-1 (T1), brown alga (Sargassum polysystum) as Treatment-2 (T(2)) and sea grass (Enhalus acoroides) as Treatment-3 (T(3))...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779747/can-multilocus-heterozygosity-reveal-inbreeding-depression
#2
F Syukri, T Nakajima, M Nakajima
Inbred lines of fish have been widely exploited as model organisms to determine the effect of inbreeding, which is often closely related to fitness such as endurance and productivity compared to morphological traits. Until now, much is unknown about the effects of inbreeding to fish. In the present study, inbred lines of guppies were used to examine the inbreeding effect on morphological traits corresponding to genotype variation. Two strains, called AY and NA1, were selected from the closed culture system...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779746/comparative-growth-and-survival-of-diploid-and-triploid-mozambique-tilapia-oreochromism-ossambicus-reared-in-indoor-tanks
#3
O F Nwachi, Yuzine B Esa
In the present study, the effect of cold shock on fertilized eggs of Oreochromis mossambicus was during triploid production. Two males (150 ? 224 g) and six gravid females (150 g to 264 g) were collected. The females were injected with ovulin at a dosage rate of 0.5ml kg(-1), the eggs were stripped into a dry bowl, fertilised with milt, divided into two groups (A and B) and incubated. After three minutes, group A was cold shocked at 50C for a period for 5 min, while group B was incubated normally. Tilapia larvae hatchlings were triplicated and stocked at a density of 200 larvae / liter in the aquaria for four weeks...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779745/sustainable-aquaculture-of-asian-arowana-a-review
#4
REVIEW
S R Medipally, F M Yusoff, N Sharifhuddin, M Shariff
Asian arowana, Scleropages formosus is a highly valued aquarium fish in the world, particularly in Asian countries, and has been listed as one of the most highly endangered species. This is a freshwater, carnivorous, fairly large mouth breeding fish belonging to the family Osteoglossidae. Arowana can be found in different colour varieties such as green, red, silver and golden. Among these varieties, Malaysian golden is the most valuable fish and is endemic to the Krian riverine system, Malaysia. However, overexploitation, habitat change and pollution have caused a serious decline of this arowana variety...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779744/effects-of-feeding-frequency-on-growth-performance-of-endangered-temoleh-probarbus-jullieni-sauvage-1880-juveniles
#5
M Hazmadi Zakaria, S M Nurul Amin, A Arshad, M Aminur Rahman, A Christianus, M Z Nor Azrie
The experiment was designed to investigate the effects of feeding frequencies on the growth and feed utilization efficiencies of endangered Temoleh, Probarbus jullieni under captive rearing condition. The juvenile fish, weighing from 12.03g to 32.64g, were fed with an extruded commercial pellet for 60 days. Three restricted feeding regimes were tested in treatments viz., three meals per day (Teratment-1, T1), two meals per day (Teratment-2, T2) and one meal per day (Teratment-3, T3). The experiment was carried out in aquarium tanks on a recirculating water system...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779743/the-effects-of-dietary-inclusion-of-garlic-on-growth-performance-and-disease-resistance-of-african-catfish-clarias-gariepinus-fingerlings-against-aeromonas-hydrophila-infection
#6
N Eirna-liza, Che Roos Saad, Hasliza Abu Hassim, Murni Karim
The present study aimed to investigate the effects of dietary inclusion of garlic (Allium sativum) peels and cloves on the growth performance and disease resistance of African catfish (Clarias gariepinus) fingerlings against Aeromonas hydrophila infection. Seven isonitrogenous (36% protein) experimental diets were formulated to contain graded levels of garlic (peels and cloves) at 0, 10, 20 and 30g.kg-1. Fish were fed twice a day for 12 weeks. The results demonstrated that no significant differences were observed with respect to growth performance or feed utilization efficiency (i...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779742/the-effects-of-dietary-inclusion-of-garlic-on-growth-performance-and-disease-resistance-of-african-catfish-clarias-gariepinus-fingerlings-against-aeromonas-hydrophila-infection
#7
RANDOMIZED CONTROLLED TRIAL
N Eirna-liza, Che Roos Saad, Hasliza Abu Hassim, Murni Karim
The present study aimed to investigate the effects of dietary inclusion of garlic (Allium sativum) peels and cloves on the growth performance and disease resistance of African catfish (Clarias gariepinus) fingerlings against Aeromonas hydrophila infection. Seven isonitrogenous (36% protein) experimental diets were formulated to contain graded levels of garlic (peels and cloves) at 0, 10, 20 and 30g.kg-1. Fish were fed twice a day for 12 weeks. The results demonstrated that no significant differences were observed with respect to growth performance or feed utilization efficiency (i...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779741/screening-and-identification-of-quorum-sensing-degraders-from-live-feed-artemia
#8
M N Noorashikin, L Y Li, M Karim, H M Daud, F M I Natrah
Quorum sensing (QS) is bacterial cell-to-cell communication with small signal molecules such as acyl-homoserine lactones (AHL) that control a number of phenotypes including the regulation of virulence determinants in pathogenic bacteria. Therefore, quorum sensing degrader has been suggested as one of the biocontrol strategies to fight bacterial infections. In the present study, different bacterial QS degrader strains were isolated from Artemia and screened using Chromobacterium violaceum CV026 bioassay. The results showed that six bacterial strains (four Gram-positive and two Gram-negative) isolated from Artemia were able to degrade AHL in two different in vitro assays...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779740/screening-and-evaluation-of-local-bacteria-isolated-from-shellfish-as-potential-probiotics-against-pathogenic-vibrios
#9
M Y Jasmin, Hazimah Wagaman, Tan Ai Yin, M Y Ina-salwany, H M Daud, Murni Karim
The present study was carried out to isolate, screen and evaluate potential candidates of local bacteria isolated from tiger shrimp Penaeus monodon and slipper cupped oysters Crassostrea iredalei as probiotics in shellfish aquaculture. A total of 144 of bacteria were successfully isolated from the intestine and stomach of 20 tails of healthy adult tiger shrimp P. monodon, while 136 were successfully isolated from the digestive tract, gills and inner shells of 10 healthy adult C. iredalei. The number of potential isolates was narrowed down to two from tiger shrimp, and one from slipper cupped oyster after in vitro screening assays...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779739/selection-and-evaluation-of-malaysian-bacillus-spp-strains-as-potential-probiotics-in-cultured-tiger-grouper-epinephelus-fuscoguttatus
#10
Ina-salwany Md Yasin, Nabilah Fatin Razak, F M I Natrah, Sharr Azni Harmin
A total of 58 Gram-positive bacteria strains were isolated from the marine environment and screened for potential probiotics for disease prevention and improving the productivity of tiger grouper Epinephelus fuscoguttatus larvae and juveniles. The bacteria were identified as Bacillus licheniformis, B. subtilis, B. circulans, B. sphaericus, B. cereus, Brevibacillus brevis, Corynebacterium propinquum, Leifsonia aquatica and Paenibacillus macerans. Only 24 strains showed antagonistic activities against four pathogenic strains; Vibrio alginolyticus, V...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779738/effects-of-dietary-peppermint-mentha-piperita-essential-oil-on-survival-growth-cannibalism-and-hepatopancreatic-histopathology-of-portunus-pelagicus-juveniles
#11
Syahirah Roslan, Sofea Taher, Fariborz Ehteshamei, Aziz Arshad, Nicholas Romano
A two-part experiment was performed to determine whether dietary peppermint oil could improve the growth and/or decrease aggression among blue swimmer crab, Portunus pelagicus early juveniles. A total of five isonitrogenous diets were made that contained increasing peppermint oil levels of 0.00, 0.05, 0.10, 0.50 or 1.00%.? These diets were fed to 45 replicate crabs in each treatment (total of 225 crabs) for 12 days, the final sizes and weights were measured, and then placed in 3 replicate containers (30 in total/treatment) to allow the opportunity for cannibalism over 10 days...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779737/the-effect-of-different-cooking-methods-on-fatty-acid-composition-and-antioxidant-activity-of-n-3-fatty-acids-fortified-tilapia-meat-with-or-without-clove-essential-oil
#12
Ehsan Ramezani-Fard, Nicholas Romano, Yong-Meng Goh, Ehsan Oskoueian, Fariborz Ehteshami, Mahdi Ebrahimi
Tilapia farmers are increasingly relying on dietary fish oil alternatives which substantially reduces health beneficial n-3 polyunsaturated fatty acids (PUFA) in tilapia products.? This may be further exacerbated depending on the cooking method.? This study aimed to evaluate the effects of different cooking methods on the fatty acid composition and oxidative stability of tilapia minced meat after prior fish oil fortifications with or without clove essential oil. Results showed that frying tilapia in either sunflower or palm oil significantly increased the saturated fatty acid and linoleic acid content, respectively, of tilapia...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779736/dietary-lipid-requirement-of-lemon-fin-barb-hybrid
#13
RANDOMIZED CONTROLLED TRIAL
Saufinas Ismail, Mohd Salleh Kamarudin, Che Roos Saad
The present study has been conducted to determine the optimal dietary requirement lipid of lemon fin barb hybrid fingerlings. Five isonitrogenous diets (35% protein) with graded lipid levels of 0%, 4%, 6%, 8% and 12% were fed to 225 lemon fin barb hybrid fingerlings (4.3 ? 0.5 g), which were randomly and equally distributed into twelve 60 l aquaria. The diets were randomly assigned to the aquaria in triplicates, and the feeding experiment was conducted for 10 weeks. Fish were fed at 5% body weight and the feeding ration was adjusted fortnightly...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779735/effects-of-varying-dietary-carbohydrate-levels-on-growth-performance-body-composition-and-liver-histology-of-malaysian-mahseer-fingerlings-tor-tambroides
#14
Sairatul Dahlianis Ishak, Mohd Salleh Kamarudin, Ehsan Ramezani-Fard, Che Roos Saad, Yus Aniza Yusof
We investigated the effects of four iso-nitrogenous (40% crude protein) and iso-caloric (17.6 kJ g(-1)) diets with different dietary carbohydrate levels (15%, 20%, 25% and 30%) on the growth performance, feed utilization efficiency, body composition and liver histology of Malaysian mahseer (Tor tambroides) fingerlings in a 10-week feeding trial. Fish (initial weight of 0.8?0.1 g; initial total length 4.2?0.1 cm) were fed twice daily at 4% body mass. Dietary carbohydrate level had significant effects (P<0...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779734/influence-of-habitat-structure-and-environmental-variables-on-larval-fish-assemblage-in-the-johor-strait-malaysia
#15
Roushon Ara, Aziz Arshad, S M Nurul Amin, M H Idris, Mazlan Abd Gaffar, Nicholas Romano
Our previous study demonstrated that among different habitat sites (mangrove, estuary, river, seagrass and Open Sea) in Johor Strait, Malaysia, seagrass showed highest family diversity and abundance of larval fish. However, it is unclear whether this was due to difference in habitat complexity or water quality parameters.? To test this, larval fish were collected by using a bongo net equipped with a flow meter by subsurface horizontal towing from different habitats in Johor Strait between October 2007 and September 2008...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779733/food-and-feeding-habits-of-omobranchus-sp-blenniidae-omobranchini-larvae-in-the-seagrass-mangrove-ecosystem-of-johor-strait-malaysia
#16
Roushon Ara, Aziz Arshad, S M Nurul Amin, Mazlan Abd Ghaffar
The stomach contents of Omobranchus sp. (family Blenniidae) larvae were investigated in a seagrass-mangrove based ecosystem in Johor Strait, Malaysia from October 2007 to September 2008. Specimens of larval fish were collected through subsurface towing of a Bongo net from five different stations. The stomach sacs of 267 Omobranchus sp. larvae were separated and observed, which comprised of 24 significant food stuffs belonging to 6 main groups viz. phytoplankton (62.45%), zooplankton (18.24%), algae (5.56%), plant-like particles (5...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779732/dna-barcoding-and-phylogenetic-analysis-of-malaysian-groupers-subfamily-epinephelinae-using-mitochondrial-cytochrome-c-oxidase-i-coi-gene
#17
Nurnadia Marshita Abdul Aziz, Yuzine Esa, Aziz Arshad
The present study was carried out to examine the species identification and phylogenetic relationships of groupers in Malaysia using mitochondrial Cytochrome c Oxidase I (COI) gene, commonly known as barcoding gene. A total of 63 individuals comprising 10 species from three genera were collected from the coastal areas of Johor, Kelantan, Pahang, Perak, Selangor and Terengganu. All the individuals were morphologically identified and molecular works involved polymerase chain reaction (PCR) and sequencing of COI barcoding fragment (655 base pairs)...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779731/reproductive-biology-of-nemipterus-japonicus-bloch-1791-from-the-coastal-waters-of-bintulu-south-china-sea-sarawak-malaysia
#18
T Nettely, A H Rajaee, N A Denil, M H Idris, M H Nesarul, S M Nurul Amin, M K Abu Hena
Samples of threadfin breams Nemipterus japonicus were collected from a village in Kuala Nyalau and a fish landing centre at Bintulu from April 2013 to March 2014. A total of 360 individuals of N. japonicus (214 male and 146 female) were used in this reproductive study.? The total length (TL) of individuals were measured to the nearest 0.1 cm and body weight (BW) was recorded to the nearest 0.1 g. Month-wise distribution of the sexes was significantly higher for males in September and March, while in the month of May the number of females was significantly higher (X(2) = 6...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779730/sex-ratio-spawning-season-and-the-size-at-maturity-of-parapenaeopsis-sculptilis-heller-1862-in-the-coastal-waters-of-perak-peninsular-malaysia
#19
A Arshad, A A Amani, S M Nurul Amin, F M Yusoff
Parapenaeopsis sculptilis (Heller, 1862) locally referred to as ?udang kulit keras? in Malaysia has profound biological, ecological, aquacultural and conservational significance. The reproductive biology of this important penaeid from the coastal waters of Perak, Peninsular Malaysia, was studied during the period between February 2012 to January 2013. Females outnumbered males with a sex ratio of M: F= 1:3 (P < 0.05). Four maturity stages of female gonads viz., immature, maturing, mature and spent stages were distinguished...
July 2016: Journal of Environmental Biology
https://www.readbyqxmd.com/read/28779729/comparison-of-condition-index-in-the-green-lipped-mussel-perna-viridis-between-sebatu-and-pasir-panjang-peninsular-malaysia
#20
S M Al-Barwani, A Arshad, S M Nurul Amin, Aminur Rahman
The condition index (which relates to the tissue dry weight to shell volume) of the green-lipped mussel Perna viridis was investigated at Sebatu in Melaka and Pasir Panjang in Negri Sembilan from September 2003 to February 2004. Monthly samples of P. viridis were collected from culturing rafts at both sites. Variations in the average monthly condition index (CI) of P. viridis ranged from 21.06 to 26.72 g cm(-3) and 15.18 to 19.41 g cm(-3) in Sebatu and Pasir Panjang, respectively. Salinity values were lowest in November between 27...
July 2016: Journal of Environmental Biology
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